1 /*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 /*-
31 * Copyright (c) 1982, 1986, 1988, 1993
32 * The Regents of the University of California.
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
43 * 4. Neither the name of the University nor the names of its contributors
44 * may be used to endorse or promote products derived from this software
45 * without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
57 * SUCH DAMAGE.
58 *
59 * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
60 */
61
62 #include <sys/cdefs.h>
63 __FBSDID("$FreeBSD: releng/9.0/sys/netinet6/raw_ip6.c 211530 2010-08-20 17:52:49Z ume $");
64
65 #include "opt_ipsec.h"
66 #include "opt_inet6.h"
67
68 #include <sys/param.h>
69 #include <sys/errno.h>
70 #include <sys/jail.h>
71 #include <sys/lock.h>
72 #include <sys/malloc.h>
73 #include <sys/mbuf.h>
74 #include <sys/priv.h>
75 #include <sys/proc.h>
76 #include <sys/protosw.h>
77 #include <sys/signalvar.h>
78 #include <sys/socket.h>
79 #include <sys/socketvar.h>
80 #include <sys/sx.h>
81 #include <sys/syslog.h>
82
83 #include <net/if.h>
84 #include <net/if_types.h>
85 #include <net/route.h>
86 #include <net/vnet.h>
87
88 #include <netinet/in.h>
89 #include <netinet/in_var.h>
90 #include <netinet/in_systm.h>
91 #include <netinet/in_pcb.h>
92
93 #include <netinet/icmp6.h>
94 #include <netinet/ip6.h>
95 #include <netinet/ip_var.h>
96 #include <netinet6/ip6protosw.h>
97 #include <netinet6/ip6_mroute.h>
98 #include <netinet6/in6_pcb.h>
99 #include <netinet6/ip6_var.h>
100 #include <netinet6/nd6.h>
101 #include <netinet6/raw_ip6.h>
102 #include <netinet6/scope6_var.h>
103 #include <netinet6/send.h>
104
105 #ifdef IPSEC
106 #include <netipsec/ipsec.h>
107 #include <netipsec/ipsec6.h>
108 #endif /* IPSEC */
109
110 #include <machine/stdarg.h>
111
112 #define satosin6(sa) ((struct sockaddr_in6 *)(sa))
113 #define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
114
115 /*
116 * Raw interface to IP6 protocol.
117 */
118
119 VNET_DECLARE(struct inpcbhead, ripcb);
120 VNET_DECLARE(struct inpcbinfo, ripcbinfo);
121 #define V_ripcb VNET(ripcb)
122 #define V_ripcbinfo VNET(ripcbinfo)
123
124 extern u_long rip_sendspace;
125 extern u_long rip_recvspace;
126
127 VNET_DEFINE(struct rip6stat, rip6stat);
128
129 /*
130 * Hooks for multicast routing. They all default to NULL, so leave them not
131 * initialized and rely on BSS being set to 0.
132 */
133
134 /*
135 * The socket used to communicate with the multicast routing daemon.
136 */
137 VNET_DEFINE(struct socket *, ip6_mrouter);
138
139 /*
140 * The various mrouter functions.
141 */
142 int (*ip6_mrouter_set)(struct socket *, struct sockopt *);
143 int (*ip6_mrouter_get)(struct socket *, struct sockopt *);
144 int (*ip6_mrouter_done)(void);
145 int (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *);
146 int (*mrt6_ioctl)(u_long, caddr_t);
147
148 /*
149 * Setup generic address and protocol structures for raw_input routine, then
150 * pass them along with mbuf chain.
151 */
152 int
153 rip6_input(struct mbuf **mp, int *offp, int proto)
154 {
155 struct ifnet *ifp;
156 struct mbuf *m = *mp;
157 register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
158 register struct inpcb *in6p;
159 struct inpcb *last = 0;
160 struct mbuf *opts = NULL;
161 struct sockaddr_in6 fromsa;
162
163 V_rip6stat.rip6s_ipackets++;
164
165 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) {
166 /* XXX Send icmp6 host/port unreach? */
167 m_freem(m);
168 return (IPPROTO_DONE);
169 }
170
171 init_sin6(&fromsa, m); /* general init */
172
173 ifp = m->m_pkthdr.rcvif;
174
175 INP_INFO_RLOCK(&V_ripcbinfo);
176 LIST_FOREACH(in6p, &V_ripcb, inp_list) {
177 /* XXX inp locking */
178 if ((in6p->inp_vflag & INP_IPV6) == 0)
179 continue;
180 if (in6p->inp_ip_p &&
181 in6p->inp_ip_p != proto)
182 continue;
183 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
184 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
185 continue;
186 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
187 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
188 continue;
189 if (jailed_without_vnet(in6p->inp_cred)) {
190 /*
191 * Allow raw socket in jail to receive multicast;
192 * assume process had PRIV_NETINET_RAW at attach,
193 * and fall through into normal filter path if so.
194 */
195 if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
196 prison_check_ip6(in6p->inp_cred,
197 &ip6->ip6_dst) != 0)
198 continue;
199 }
200 if (in6p->in6p_cksum != -1) {
201 V_rip6stat.rip6s_isum++;
202 if (in6_cksum(m, proto, *offp,
203 m->m_pkthdr.len - *offp)) {
204 INP_RUNLOCK(in6p);
205 V_rip6stat.rip6s_badsum++;
206 continue;
207 }
208 }
209 INP_RLOCK(in6p);
210 /*
211 * If this raw socket has multicast state, and we
212 * have received a multicast, check if this socket
213 * should receive it, as multicast filtering is now
214 * the responsibility of the transport layer.
215 */
216 if (in6p->in6p_moptions &&
217 IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
218 /*
219 * If the incoming datagram is for MLD, allow it
220 * through unconditionally to the raw socket.
221 *
222 * Use the M_RTALERT_MLD flag to check for MLD
223 * traffic without having to inspect the mbuf chain
224 * more deeply, as all MLDv1/v2 host messages MUST
225 * contain the Router Alert option.
226 *
227 * In the case of MLDv1, we may not have explicitly
228 * joined the group, and may have set IFF_ALLMULTI
229 * on the interface. im6o_mc_filter() may discard
230 * control traffic we actually need to see.
231 *
232 * Userland multicast routing daemons should continue
233 * filter the control traffic appropriately.
234 */
235 int blocked;
236
237 blocked = MCAST_PASS;
238 if ((m->m_flags & M_RTALERT_MLD) == 0) {
239 struct sockaddr_in6 mcaddr;
240
241 bzero(&mcaddr, sizeof(struct sockaddr_in6));
242 mcaddr.sin6_len = sizeof(struct sockaddr_in6);
243 mcaddr.sin6_family = AF_INET6;
244 mcaddr.sin6_addr = ip6->ip6_dst;
245
246 blocked = im6o_mc_filter(in6p->in6p_moptions,
247 ifp,
248 (struct sockaddr *)&mcaddr,
249 (struct sockaddr *)&fromsa);
250 }
251 if (blocked != MCAST_PASS) {
252 IP6STAT_INC(ip6s_notmember);
253 INP_RUNLOCK(in6p);
254 continue;
255 }
256 }
257 if (last != NULL) {
258 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
259
260 #ifdef IPSEC
261 /*
262 * Check AH/ESP integrity.
263 */
264 if (n && ipsec6_in_reject(n, last)) {
265 m_freem(n);
266 V_ipsec6stat.in_polvio++;
267 /* Do not inject data into pcb. */
268 } else
269 #endif /* IPSEC */
270 if (n) {
271 if (last->inp_flags & INP_CONTROLOPTS ||
272 last->inp_socket->so_options & SO_TIMESTAMP)
273 ip6_savecontrol(last, n, &opts);
274 /* strip intermediate headers */
275 m_adj(n, *offp);
276 if (sbappendaddr(&last->inp_socket->so_rcv,
277 (struct sockaddr *)&fromsa,
278 n, opts) == 0) {
279 m_freem(n);
280 if (opts)
281 m_freem(opts);
282 V_rip6stat.rip6s_fullsock++;
283 } else
284 sorwakeup(last->inp_socket);
285 opts = NULL;
286 }
287 INP_RUNLOCK(last);
288 }
289 last = in6p;
290 }
291 INP_INFO_RUNLOCK(&V_ripcbinfo);
292 #ifdef IPSEC
293 /*
294 * Check AH/ESP integrity.
295 */
296 if ((last != NULL) && ipsec6_in_reject(m, last)) {
297 m_freem(m);
298 V_ipsec6stat.in_polvio++;
299 V_ip6stat.ip6s_delivered--;
300 /* Do not inject data into pcb. */
301 INP_RUNLOCK(last);
302 } else
303 #endif /* IPSEC */
304 if (last != NULL) {
305 if (last->inp_flags & INP_CONTROLOPTS ||
306 last->inp_socket->so_options & SO_TIMESTAMP)
307 ip6_savecontrol(last, m, &opts);
308 /* Strip intermediate headers. */
309 m_adj(m, *offp);
310 if (sbappendaddr(&last->inp_socket->so_rcv,
311 (struct sockaddr *)&fromsa, m, opts) == 0) {
312 m_freem(m);
313 if (opts)
314 m_freem(opts);
315 V_rip6stat.rip6s_fullsock++;
316 } else
317 sorwakeup(last->inp_socket);
318 INP_RUNLOCK(last);
319 } else {
320 V_rip6stat.rip6s_nosock++;
321 if (m->m_flags & M_MCAST)
322 V_rip6stat.rip6s_nosockmcast++;
323 if (proto == IPPROTO_NONE)
324 m_freem(m);
325 else {
326 char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */
327 icmp6_error(m, ICMP6_PARAM_PROB,
328 ICMP6_PARAMPROB_NEXTHEADER,
329 prvnxtp - mtod(m, char *));
330 }
331 V_ip6stat.ip6s_delivered--;
332 }
333 return (IPPROTO_DONE);
334 }
335
336 void
337 rip6_ctlinput(int cmd, struct sockaddr *sa, void *d)
338 {
339 struct ip6_hdr *ip6;
340 struct mbuf *m;
341 int off = 0;
342 struct ip6ctlparam *ip6cp = NULL;
343 const struct sockaddr_in6 *sa6_src = NULL;
344 void *cmdarg;
345 struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange;
346
347 if (sa->sa_family != AF_INET6 ||
348 sa->sa_len != sizeof(struct sockaddr_in6))
349 return;
350
351 if ((unsigned)cmd >= PRC_NCMDS)
352 return;
353 if (PRC_IS_REDIRECT(cmd))
354 notify = in6_rtchange, d = NULL;
355 else if (cmd == PRC_HOSTDEAD)
356 d = NULL;
357 else if (inet6ctlerrmap[cmd] == 0)
358 return;
359
360 /*
361 * If the parameter is from icmp6, decode it.
362 */
363 if (d != NULL) {
364 ip6cp = (struct ip6ctlparam *)d;
365 m = ip6cp->ip6c_m;
366 ip6 = ip6cp->ip6c_ip6;
367 off = ip6cp->ip6c_off;
368 cmdarg = ip6cp->ip6c_cmdarg;
369 sa6_src = ip6cp->ip6c_src;
370 } else {
371 m = NULL;
372 ip6 = NULL;
373 cmdarg = NULL;
374 sa6_src = &sa6_any;
375 }
376
377 (void) in6_pcbnotify(&V_ripcbinfo, sa, 0,
378 (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
379 }
380
381 /*
382 * Generate IPv6 header and pass packet to ip6_output. Tack on options user
383 * may have setup with control call.
384 */
385 int
386 #if __STDC__
387 rip6_output(struct mbuf *m, ...)
388 #else
389 rip6_output(m, va_alist)
390 struct mbuf *m;
391 va_dcl
392 #endif
393 {
394 struct mbuf *control;
395 struct m_tag *mtag;
396 struct socket *so;
397 struct sockaddr_in6 *dstsock;
398 struct in6_addr *dst;
399 struct ip6_hdr *ip6;
400 struct inpcb *in6p;
401 u_int plen = m->m_pkthdr.len;
402 int error = 0;
403 struct ip6_pktopts opt, *optp;
404 struct ifnet *oifp = NULL;
405 int type = 0, code = 0; /* for ICMPv6 output statistics only */
406 int scope_ambiguous = 0;
407 int use_defzone = 0;
408 struct in6_addr in6a;
409 va_list ap;
410
411 va_start(ap, m);
412 so = va_arg(ap, struct socket *);
413 dstsock = va_arg(ap, struct sockaddr_in6 *);
414 control = va_arg(ap, struct mbuf *);
415 va_end(ap);
416
417 in6p = sotoinpcb(so);
418 INP_WLOCK(in6p);
419
420 dst = &dstsock->sin6_addr;
421 if (control != NULL) {
422 if ((error = ip6_setpktopts(control, &opt,
423 in6p->in6p_outputopts, so->so_cred,
424 so->so_proto->pr_protocol)) != 0) {
425 goto bad;
426 }
427 optp = &opt;
428 } else
429 optp = in6p->in6p_outputopts;
430
431 /*
432 * Check and convert scope zone ID into internal form.
433 *
434 * XXX: we may still need to determine the zone later.
435 */
436 if (!(so->so_state & SS_ISCONNECTED)) {
437 if (!optp || !optp->ip6po_pktinfo ||
438 !optp->ip6po_pktinfo->ipi6_ifindex)
439 use_defzone = V_ip6_use_defzone;
440 if (dstsock->sin6_scope_id == 0 && !use_defzone)
441 scope_ambiguous = 1;
442 if ((error = sa6_embedscope(dstsock, use_defzone)) != 0)
443 goto bad;
444 }
445
446 /*
447 * For an ICMPv6 packet, we should know its type and code to update
448 * statistics.
449 */
450 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
451 struct icmp6_hdr *icmp6;
452 if (m->m_len < sizeof(struct icmp6_hdr) &&
453 (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
454 error = ENOBUFS;
455 goto bad;
456 }
457 icmp6 = mtod(m, struct icmp6_hdr *);
458 type = icmp6->icmp6_type;
459 code = icmp6->icmp6_code;
460 }
461
462 M_PREPEND(m, sizeof(*ip6), M_DONTWAIT);
463 if (m == NULL) {
464 error = ENOBUFS;
465 goto bad;
466 }
467 ip6 = mtod(m, struct ip6_hdr *);
468
469 /*
470 * Source address selection.
471 */
472 error = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred,
473 &oifp, &in6a);
474 if (error)
475 goto bad;
476 error = prison_check_ip6(in6p->inp_cred, &in6a);
477 if (error != 0)
478 goto bad;
479 ip6->ip6_src = in6a;
480
481 if (oifp && scope_ambiguous) {
482 /*
483 * Application should provide a proper zone ID or the use of
484 * default zone IDs should be enabled. Unfortunately, some
485 * applications do not behave as it should, so we need a
486 * workaround. Even if an appropriate ID is not determined
487 * (when it's required), if we can determine the outgoing
488 * interface. determine the zone ID based on the interface.
489 */
490 error = in6_setscope(&dstsock->sin6_addr, oifp, NULL);
491 if (error != 0)
492 goto bad;
493 }
494 ip6->ip6_dst = dstsock->sin6_addr;
495
496 /*
497 * Fill in the rest of the IPv6 header fields.
498 */
499 ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
500 (in6p->inp_flow & IPV6_FLOWINFO_MASK);
501 ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
502 (IPV6_VERSION & IPV6_VERSION_MASK);
503
504 /*
505 * ip6_plen will be filled in ip6_output, so not fill it here.
506 */
507 ip6->ip6_nxt = in6p->inp_ip_p;
508 ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
509
510 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
511 in6p->in6p_cksum != -1) {
512 struct mbuf *n;
513 int off;
514 u_int16_t *p;
515
516 /* Compute checksum. */
517 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
518 off = offsetof(struct icmp6_hdr, icmp6_cksum);
519 else
520 off = in6p->in6p_cksum;
521 if (plen < off + 1) {
522 error = EINVAL;
523 goto bad;
524 }
525 off += sizeof(struct ip6_hdr);
526
527 n = m;
528 while (n && n->m_len <= off) {
529 off -= n->m_len;
530 n = n->m_next;
531 }
532 if (!n)
533 goto bad;
534 p = (u_int16_t *)(mtod(n, caddr_t) + off);
535 *p = 0;
536 *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
537 }
538
539 /*
540 * Send RA/RS messages to user land for protection, before sending
541 * them to rtadvd/rtsol.
542 */
543 if ((send_sendso_input_hook != NULL) &&
544 so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
545 switch (type) {
546 case ND_ROUTER_ADVERT:
547 case ND_ROUTER_SOLICIT:
548 mtag = m_tag_get(PACKET_TAG_ND_OUTGOING,
549 sizeof(unsigned short), M_NOWAIT);
550 if (mtag == NULL)
551 goto bad;
552 m_tag_prepend(m, mtag);
553 }
554 }
555
556 error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p);
557 if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
558 if (oifp)
559 icmp6_ifoutstat_inc(oifp, type, code);
560 ICMP6STAT_INC(icp6s_outhist[type]);
561 } else
562 V_rip6stat.rip6s_opackets++;
563
564 goto freectl;
565
566 bad:
567 if (m)
568 m_freem(m);
569
570 freectl:
571 if (control != NULL) {
572 ip6_clearpktopts(&opt, -1);
573 m_freem(control);
574 }
575 INP_WUNLOCK(in6p);
576 return (error);
577 }
578
579 /*
580 * Raw IPv6 socket option processing.
581 */
582 int
583 rip6_ctloutput(struct socket *so, struct sockopt *sopt)
584 {
585 int error;
586
587 if (sopt->sopt_level == IPPROTO_ICMPV6)
588 /*
589 * XXX: is it better to call icmp6_ctloutput() directly
590 * from protosw?
591 */
592 return (icmp6_ctloutput(so, sopt));
593 else if (sopt->sopt_level != IPPROTO_IPV6)
594 return (EINVAL);
595
596 error = 0;
597
598 switch (sopt->sopt_dir) {
599 case SOPT_GET:
600 switch (sopt->sopt_name) {
601 case MRT6_INIT:
602 case MRT6_DONE:
603 case MRT6_ADD_MIF:
604 case MRT6_DEL_MIF:
605 case MRT6_ADD_MFC:
606 case MRT6_DEL_MFC:
607 case MRT6_PIM:
608 error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) :
609 EOPNOTSUPP;
610 break;
611 case IPV6_CHECKSUM:
612 error = ip6_raw_ctloutput(so, sopt);
613 break;
614 default:
615 error = ip6_ctloutput(so, sopt);
616 break;
617 }
618 break;
619
620 case SOPT_SET:
621 switch (sopt->sopt_name) {
622 case MRT6_INIT:
623 case MRT6_DONE:
624 case MRT6_ADD_MIF:
625 case MRT6_DEL_MIF:
626 case MRT6_ADD_MFC:
627 case MRT6_DEL_MFC:
628 case MRT6_PIM:
629 error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) :
630 EOPNOTSUPP;
631 break;
632 case IPV6_CHECKSUM:
633 error = ip6_raw_ctloutput(so, sopt);
634 break;
635 default:
636 error = ip6_ctloutput(so, sopt);
637 break;
638 }
639 break;
640 }
641
642 return (error);
643 }
644
645 static int
646 rip6_attach(struct socket *so, int proto, struct thread *td)
647 {
648 struct inpcb *inp;
649 struct icmp6_filter *filter;
650 int error;
651
652 inp = sotoinpcb(so);
653 KASSERT(inp == NULL, ("rip6_attach: inp != NULL"));
654
655 error = priv_check(td, PRIV_NETINET_RAW);
656 if (error)
657 return (error);
658 error = soreserve(so, rip_sendspace, rip_recvspace);
659 if (error)
660 return (error);
661 filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT);
662 if (filter == NULL)
663 return (ENOMEM);
664 INP_INFO_WLOCK(&V_ripcbinfo);
665 error = in_pcballoc(so, &V_ripcbinfo);
666 if (error) {
667 INP_INFO_WUNLOCK(&V_ripcbinfo);
668 free(filter, M_PCB);
669 return (error);
670 }
671 inp = (struct inpcb *)so->so_pcb;
672 INP_INFO_WUNLOCK(&V_ripcbinfo);
673 inp->inp_vflag |= INP_IPV6;
674 inp->inp_ip_p = (long)proto;
675 inp->in6p_hops = -1; /* use kernel default */
676 inp->in6p_cksum = -1;
677 inp->in6p_icmp6filt = filter;
678 ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
679 INP_WUNLOCK(inp);
680 return (0);
681 }
682
683 static void
684 rip6_detach(struct socket *so)
685 {
686 struct inpcb *inp;
687
688 inp = sotoinpcb(so);
689 KASSERT(inp != NULL, ("rip6_detach: inp == NULL"));
690
691 if (so == V_ip6_mrouter && ip6_mrouter_done)
692 ip6_mrouter_done();
693 /* xxx: RSVP */
694 INP_INFO_WLOCK(&V_ripcbinfo);
695 INP_WLOCK(inp);
696 free(inp->in6p_icmp6filt, M_PCB);
697 in_pcbdetach(inp);
698 in_pcbfree(inp);
699 INP_INFO_WUNLOCK(&V_ripcbinfo);
700 }
701
702 /* XXXRW: This can't ever be called. */
703 static void
704 rip6_abort(struct socket *so)
705 {
706 struct inpcb *inp;
707
708 inp = sotoinpcb(so);
709 KASSERT(inp != NULL, ("rip6_abort: inp == NULL"));
710
711 soisdisconnected(so);
712 }
713
714 static void
715 rip6_close(struct socket *so)
716 {
717 struct inpcb *inp;
718
719 inp = sotoinpcb(so);
720 KASSERT(inp != NULL, ("rip6_close: inp == NULL"));
721
722 soisdisconnected(so);
723 }
724
725 static int
726 rip6_disconnect(struct socket *so)
727 {
728 struct inpcb *inp;
729
730 inp = sotoinpcb(so);
731 KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL"));
732
733 if ((so->so_state & SS_ISCONNECTED) == 0)
734 return (ENOTCONN);
735 inp->in6p_faddr = in6addr_any;
736 rip6_abort(so);
737 return (0);
738 }
739
740 static int
741 rip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
742 {
743 struct inpcb *inp;
744 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
745 struct ifaddr *ifa = NULL;
746 int error = 0;
747
748 inp = sotoinpcb(so);
749 KASSERT(inp != NULL, ("rip6_bind: inp == NULL"));
750
751 if (nam->sa_len != sizeof(*addr))
752 return (EINVAL);
753 if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0)
754 return (error);
755 if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6)
756 return (EADDRNOTAVAIL);
757 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0)
758 return (error);
759
760 if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
761 (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL)
762 return (EADDRNOTAVAIL);
763 if (ifa != NULL &&
764 ((struct in6_ifaddr *)ifa)->ia6_flags &
765 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
766 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
767 ifa_free(ifa);
768 return (EADDRNOTAVAIL);
769 }
770 if (ifa != NULL)
771 ifa_free(ifa);
772 INP_INFO_WLOCK(&V_ripcbinfo);
773 INP_WLOCK(inp);
774 inp->in6p_laddr = addr->sin6_addr;
775 INP_WUNLOCK(inp);
776 INP_INFO_WUNLOCK(&V_ripcbinfo);
777 return (0);
778 }
779
780 static int
781 rip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
782 {
783 struct inpcb *inp;
784 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
785 struct in6_addr in6a;
786 struct ifnet *ifp = NULL;
787 int error = 0, scope_ambiguous = 0;
788
789 inp = sotoinpcb(so);
790 KASSERT(inp != NULL, ("rip6_connect: inp == NULL"));
791
792 if (nam->sa_len != sizeof(*addr))
793 return (EINVAL);
794 if (TAILQ_EMPTY(&V_ifnet))
795 return (EADDRNOTAVAIL);
796 if (addr->sin6_family != AF_INET6)
797 return (EAFNOSUPPORT);
798
799 /*
800 * Application should provide a proper zone ID or the use of default
801 * zone IDs should be enabled. Unfortunately, some applications do
802 * not behave as it should, so we need a workaround. Even if an
803 * appropriate ID is not determined, we'll see if we can determine
804 * the outgoing interface. If we can, determine the zone ID based on
805 * the interface below.
806 */
807 if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone)
808 scope_ambiguous = 1;
809 if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0)
810 return (error);
811
812 INP_INFO_WLOCK(&V_ripcbinfo);
813 INP_WLOCK(inp);
814 /* Source address selection. XXX: need pcblookup? */
815 error = in6_selectsrc(addr, inp->in6p_outputopts,
816 inp, NULL, so->so_cred, &ifp, &in6a);
817 if (error) {
818 INP_WUNLOCK(inp);
819 INP_INFO_WUNLOCK(&V_ripcbinfo);
820 return (error);
821 }
822
823 /* XXX: see above */
824 if (ifp && scope_ambiguous &&
825 (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) {
826 INP_WUNLOCK(inp);
827 INP_INFO_WUNLOCK(&V_ripcbinfo);
828 return (error);
829 }
830 inp->in6p_faddr = addr->sin6_addr;
831 inp->in6p_laddr = in6a;
832 soisconnected(so);
833 INP_WUNLOCK(inp);
834 INP_INFO_WUNLOCK(&V_ripcbinfo);
835 return (0);
836 }
837
838 static int
839 rip6_shutdown(struct socket *so)
840 {
841 struct inpcb *inp;
842
843 inp = sotoinpcb(so);
844 KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL"));
845
846 INP_WLOCK(inp);
847 socantsendmore(so);
848 INP_WUNLOCK(inp);
849 return (0);
850 }
851
852 static int
853 rip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
854 struct mbuf *control, struct thread *td)
855 {
856 struct inpcb *inp;
857 struct sockaddr_in6 tmp;
858 struct sockaddr_in6 *dst;
859 int ret;
860
861 inp = sotoinpcb(so);
862 KASSERT(inp != NULL, ("rip6_send: inp == NULL"));
863
864 /* Always copy sockaddr to avoid overwrites. */
865 /* Unlocked read. */
866 if (so->so_state & SS_ISCONNECTED) {
867 if (nam) {
868 m_freem(m);
869 return (EISCONN);
870 }
871 /* XXX */
872 bzero(&tmp, sizeof(tmp));
873 tmp.sin6_family = AF_INET6;
874 tmp.sin6_len = sizeof(struct sockaddr_in6);
875 INP_RLOCK(inp);
876 bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
877 sizeof(struct in6_addr));
878 INP_RUNLOCK(inp);
879 dst = &tmp;
880 } else {
881 if (nam == NULL) {
882 m_freem(m);
883 return (ENOTCONN);
884 }
885 if (nam->sa_len != sizeof(struct sockaddr_in6)) {
886 m_freem(m);
887 return (EINVAL);
888 }
889 tmp = *(struct sockaddr_in6 *)nam;
890 dst = &tmp;
891
892 if (dst->sin6_family == AF_UNSPEC) {
893 /*
894 * XXX: we allow this case for backward
895 * compatibility to buggy applications that
896 * rely on old (and wrong) kernel behavior.
897 */
898 log(LOG_INFO, "rip6 SEND: address family is "
899 "unspec. Assume AF_INET6\n");
900 dst->sin6_family = AF_INET6;
901 } else if (dst->sin6_family != AF_INET6) {
902 m_freem(m);
903 return(EAFNOSUPPORT);
904 }
905 }
906 ret = rip6_output(m, so, dst, control);
907 return (ret);
908 }
909
910 struct pr_usrreqs rip6_usrreqs = {
911 .pru_abort = rip6_abort,
912 .pru_attach = rip6_attach,
913 .pru_bind = rip6_bind,
914 .pru_connect = rip6_connect,
915 .pru_control = in6_control,
916 .pru_detach = rip6_detach,
917 .pru_disconnect = rip6_disconnect,
918 .pru_peeraddr = in6_getpeeraddr,
919 .pru_send = rip6_send,
920 .pru_shutdown = rip6_shutdown,
921 .pru_sockaddr = in6_getsockaddr,
922 .pru_close = rip6_close,
923 };
Cache object: dcc63ce0dc86f83ff89818279fae2f34
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